view lib/alib/prints.as @ 3158:927ba5ebc06e

mc09 l2: move MMU bit-field defines to defs file.
author Neal Crook <foofoobedoo@gmail.com>
date Thu, 06 Apr 2017 21:43:58 +0100
parents 03f26e88b809
children
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* Print a program-embedded, null terminated string to standard out.

* OTHER MODULES NEEDED: puts

* ENTRY: Null terminated string must follow PRINTS call
*        eg: LBSR PRINTS
*            fcc /this is stuff to print/
*            fcb $0d  * a new line
*            fcc /more stuff to print/
*            fcb $0d,0  the end
*            lda #xx or whatever..
*            * the rest of the program....

* EXIT: CC carry set if error
*       B error code (if any)


 nam Print Embedded String to Std. Out
 ttl Assembler Library Module


 section .text

PRINTS:
 pshs x,u
 ldx 4,s get start of string (old return address)
 tfr x,u copy it

loop
 tst ,u+ advance U to end of string
 bne loop

 stu 4,s one past null=return address
 lbsr PUTS print from orig pos.
 puls x,u,pc return to caller

 endsect